Michael Fuhr wrote: > On Sun, Dec 11, 2005 at 11:53:36AM +0000, Carlos Benkendorf wrote: > > I would like to use autovacuum but is not too much expensive > > collecting row level statistics? > > The cost depends on your usage patterns. I did tests with one of > my applications and saw no significant performance difference for > simple selects, but a series of insert/update/delete operations ran > about 30% slower when block- and row-level statistics were enabled > versus when the statistics collector was disabled. This series of i/u/d operations ran with no sleep in between, right? I wouldn't expect a normal OLTP operation to be like this. (If it is you have a serious shortage of hardware ...) -- Alvaro Herrera http://www.CommandPrompt.com/ PostgreSQL Replication, Consulting, Custom Development, 24x7 support
